There's a great pattern here for a warm winter hat: http://www.redlipstick.net/knit/martext.html
I used Lamb's Pride Worsted and US7 needles as suggested, but found that I needed to add a ton of stitches to make an adult-sized hat! I added an extra 16 stitches to the circumference and an extra 12 or so rows in length. I actually wish I'd added a few more rows so the fold-up brim would be longer.
Here's my first sock, made with Cascade Fixation, pattern from here: http://members.citynet.net/cloudninedesign/pages/comfysock.html
Almost done with its mate.
And here is "Shimmer" from Knitty (www.knitty.com/ISSUEwinter03/PATTshimmer.html
) made with Brown Sheep Cotton Fleece.
The lace is a little wonky and the bottom edge is loose and wrinkly - I hope blocking will help. I enjoyed the pattern. It was the most challenging I have done so far, and it was especially confusing trying to do the lace while decreasing! Good luck to anyone who tries this pattern.
Thanks for looking!